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WAEC WASSCE Biology 2003 past questions and answers

This 2003 WAEC WASSCE Biology set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2003 set with instant marking.

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Sample WAEC WASSCE Biology 2003 questions

1. Which tissue gives a young dicot stem flexible support while it is still growing?
  1. Collenchyma
  2. Sclerenchyma fibres
  3. Xylem vessels
  4. Phloem sieve tubes

Answer: A. Collenchyma

Collenchyma cells have unevenly thickened walls that support growing parts without preventing bending.

2. Which feature helps a floating aquatic plant remain buoyant?
  1. A thick waxy cuticle on every submerged surface
  2. Large air spaces in its tissues
  3. A deep taproot anchoring it in dry soil
  4. Numerous hairs that absorb water from air

Answer: B. Large air spaces in its tissues

Air spaces reduce tissue density and help keep a floating plant at the water surface.

3. After a pollen grain germinates on a flower's stigma, what does its pollen tube do?
  1. Carries the ovary to the anther
  2. Forms the petals around the ovule
  3. Delivers male nuclei to the embryo sac
  4. Changes the stigma into a fruit

Answer: C. Delivers male nuclei to the embryo sac

The pollen tube grows through the style and delivers male nuclei to the embryo sac for fertilisation.

4. What is the main role of the placenta during pregnancy in humans?
  1. It produces the mother's red blood cells for the foetus.
  2. It mixes maternal and foetal blood completely.
  3. It digests food inside the foetal intestine.
  4. It allows exchange of substances between maternal and foetal blood.

Answer: D. It allows exchange of substances between maternal and foetal blood.

The placenta enables exchange of oxygen, nutrients and wastes between maternal and foetal blood without normally mixing them.

5. A viable bean seed will normally germinate only when it has water, oxygen and suitable warmth because these conditions enable
  1. metabolic activity and enzyme action in the embryo
  2. the seed coat to make chlorophyll
  3. the embryo to obtain food by photosynthesis before emergence
  4. the cotyledons to absorb minerals directly from air

Answer: A. metabolic activity and enzyme action in the embryo

Water, oxygen and suitable warmth allow respiration and enzyme-controlled metabolism in the embryo to begin.

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